Just thought I'd share something that kept me busy for the past few hours (and, after some searching, apparently quite a few people online as well): OnLocation CS5 refusing to record at all - either by clicking the record button, hitting F2 or using the camera. Simply, no file is created, time does not advance, nothing.
After several combinations of cameras, including my Sony V1E, and machines (all Windows 7, might be relevant), I hit upon disabling the built-in webcams of the laptops and of one of the attached monitors of the desktop. Instantly, problem solved...
Hope this was of use to someone!
I got sooooooooooooooooo excited when I read this post because I'm having this exact issue on my HP DV8
T laptop with a built-in webcam. I went into the Device Manager and disabled the webcam but it didn't fix the issue.
In OnLocation I still have a video input choice of "HP web camera filter" along with "Canon Camcorder" (the "HP Webcam" choice is now gone). I suspect there's still something HP has put into the video stream that messes up OL and Pr (Pr also can't capture from the camera).
All works fine on my desktop installation, so it isn't the camera. HDVSplit is also fubar on the laptop but works on the desktop.
Solved! It was a 1394 driver problem that seems to be an issue on HP DV7 and DV8 laptops. Google this:
"Jmicron 1394 filter driver"